Engine-testing device.



W E. SOMERWUE. ENGINE'TESYING DEVICE.

Awucmlma mm mm. 21, ms.

Patented Den. 4, 1917.

3 SHEETS-SHEET 3 11 gw mmw ad. ti

dpecifieation oat" ItettersdPatent.

* lPatented Dec; etglltluth application. filed January 2'71, Jlfllld. denial ll 'lo. Ft-,fitld.

To all whom may concern certaining'the condition of the engine, such as by means of a visual indication of the working pressure within the cylinder or cylinders or the condition of the ignition system, spark plugs or oi the cause of the trouble. j I

it further object is to provide an improved device of this trical and mechanical testing means are coinpactly combined in a single structure and. arranged in a convenient position for the operator.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substan tially the construction, combination and arrangement or the several parts, hereinafter more fully described and claimed and shown in the accompanying drawing illustrating the invention and in which Figure 1 is a diagrammatic view oi? an im' proved device ot this character constructed in accordance with the principles of this in? vention and shown in connection with six engine cylinders.

lBig. 2 is an enlarged detail view partly in elevation and partly in section elf the indicating mechanism.

Fig. 3 is a vertical sectional view taken on line33, 2.

liiig. dis a diagrammatic view of the wiring shown in Fig. 2.

Fig 5 is a view in elevation of a modified form of the invention.

Referring more particularly to the drawings, the numeral 10 designates the engine cylinders having the usual spark plugs 11.

Arranged in any suitable 5 position is a chamber 12, which may be, mounted upon a support 13, and communicating with the chamber 12 is a cylinders characterwvherein the elecspark plugs in any D pressure gage ll, having an indicator or han 15 which cooperates with the. graduations l6 Leading 10 is a passage 17, and each of these passages has connection with the cha n it is a controlling valve 18 and a check from'the interior of each oi the to ber 12, and arranged in each of thepassages valve 19, so that when the respective valves 18 are open, the pressure from the cylinders 10 will be exerted through the chamber 12 to theindicator 1d. The

vided to prevent the 10 from influencing the gage 1d. A relief valve 20 of any desired type, is provided for the chamber 12 so that after the test has beenmade, of any one or more of the cylinders,'the relietvalve 20 may be opened, preferably manually to relieve-the pressure in the chamber 12.

Mounted upon the support13 which carries the chamber 12 are contacts 21,22, which are permanently spaced from each other to form jump sparks, The contact 21 is grounded preferably through the support 13 and cylinders 10 and electrically con- ,nected with the contact 22, which latter is insulated as at 23, is a conductor 24 arranged within which conductor are a plurality of make and break devices 25, 26, 27.

Leading trom the respective spark plugs of the engine cylinders 10 are conductors 28, 29, 30, 31, 32 and 33, and these conduc-1 tors are respectively connected with, termi' nal contacts 3 1-, 36, 37, 38 and 39, the

terminal contacts being arranged upon the support 18.

The make and break devices 25, 26 and 27 are located in convenient positions as are also the terminal contacts so'that any one of the make and break devices may be shifted so as to form an electrical connection between the contact 22 and the spark plugs 11, thereby completing the circuit to the con tact 22 from the respective spark plugs on the engine cylinders.

If the spark plugs of the particular engine cylinder which is to be tested is operating correctly, there will-be a visual indication of the' same by a jump spark between the contacts 21, 22.

Thus it will be manifest that any of the one of the engine cylinders may be tested by shifting the respeccheckvalvelt) is pr suctlon 1n the cylinders.

" tive cutoff devices .25, 26,27 sodas toelee- I trically connect the respective terminalcontacts 34, 35, 36, 37,38 or 39 with the spaced .contacts 21, 22. I

The operating condition of the cylinder as to pressure may be tested by means of the gage 14 and all that is necessary to accomplish this is to open the controlling valve 18 in the passage 17 which leads from the chamber 12 to the engine cylinder to be' tested. v I I The gage. 14 may be of'the ordinary and well known type, and when the controlling valve 18 is open it will be manifest that thecompression within the engine cylinder may be readily ascertained from the gage and also the explosion pressure may be obtained 1 1n the same manner.

The working condition of the interior of the cylinder, the condition of the valves or the condition of the ignition systemmay be simultaneously obtained by means of the pressure indicating gage 14 and the jump sparks between the contacts 21, 22 or if desired, the condition of the ignition system may be obtained independently of the pressure condition in the cylinder by simply closing 'the respective controlling valves 18 in the passages 17. Y

In order to render it possible to obtain the pressure condition within the cylinders and the condition of the valves, it is not desirable to produce a spark in the cylinders and in order to obviate this another make I connected, and then both of. the contacts will be grounded so that there will be no jump spark produced between the contacts 21,- 22, nor will there be a spark produced by the spark plugs 11 in the cylinders.

.The'condition of the compression of the charge in the engine cylinder and the explosion pressure in the engine cylinder may e readily ascertained by the amount of pressure indicated on the gage 14, for instance, the pressure method of testing the cylinder for ascertaining the compression of the charge will be indicated on the gage to the extent of from sixty to eighty pounds, while the explosion pressure will be indicated-on the gage to the extent of three hundred pounds or more.

. In the form of the invention shown in Fig. 5, a flexible conductor 41 is electrically connected with the contact 22 and to the other end. of the conductor is connected a handle 42 provided with a' contact 43 so that with this form, the ignition system may be tested by simply moving the contact 43 into engagement with any one of the spark plugs 11.

With this improved constructionit willbe manifest that it'is not only compactly arranged, but that there is produced a combination electrical and mechanical testing device whereby either the .pressure conditions in the cylinder may tested or the condition of the ignition system tested separately or simultanously, at the will of the operator.

While thepreferred forms of the invention have been herein shown and described,

it is to be understood that many changes may be made in the details of construction and in the combination and arrangement of the several parts, without departing from the spirit of this invention and therefore it is desired that the drawing herewith submitted be considered as being merely diagrammatic.

What is claimed as new is:

1.- A combined electrical and mechanical testing device for explosion engines, said device embodying a pressure chamber having communication with one or more engine cylinders, means for controlling such connections, a pressure gage communicatin with the chamber, a pair of contacts spaced to form jump sparks, one of said contacts being grounded, and means whereby the engine spark plugs may be electrically connected with the other of said contacts.

2. A combined electrical and mechanical testing device for explosion engines, said device embodying a pressure chamber having communication with one or more engine cylinders, means for controlling such connections, a pressure gage communicating with the chamber, a relief valve for the chamber, a pair of contacts spaced to form jump sparks, one of said contacts being grounded, and means whereby the engine spark plugs may be electrically connected with the other of said contacts.

3. A combined electrical and mechanical testing device for explosion engines, said de vice embodying a pressure chamber having communication with one or more engine cylinders, means for controlling such connections, a pressure gage communicating with the chamber, a pair of contacts spaced to form jump sparks, one of said contacts being grounded, and means whereby the engine spark plugs may be electrically connected with the other of said contacts, the last recited means embodying a circuit make and break device.

4. A combined electrical and mechanical testing device for explosion engines, said device embodying a pressure chamber having communication with one or more engine cylinders, means for controlling such connections, a pressure gage communicating with weaves the chamber, a pair of Contacts spaced to form jump sparks, one of said contacts being grounded, means electrically connecting the engine'spark plugs with the other of said contacts, and means for grounding the last recited contact. Y

5. A combined electrical and mechanical testing device for explosion engines, said device embodying a pressure chamber having communication with one or more engine cylinders, means for controlling such connectlons, a pressure gage commumcatmg wlth'the chamber, a pair of contacts spaced to form jump sparks, one of said contacts being grounded, means electrically connecting the engine spark plugs with the other of said contacts, and means for electrilclally connecting the spaced contacts at W1 6. A combined electrical and mechanicaltesting devic e, for explosion engines, said device embodying a pressure chamber having communication with one or more engine cylinders, means for controlling such connections, a pressure gage communicating with the chamber, a pair of contacts spaced to -form jump sparks, one of said contacts betrolling them,a pressure gage communicating w1th the chamber a pair of contacts permanently spaced to torm jump sparks, one

of said contacts being grounded, means for electrically connectin the other contact with the engine {spar plug, and a circuit make and break device electrically connected with one of the said contacts and adapted to bridge the contacts for grounding both ofthe contacts.

8. A.- combined electrical and mechanical testing device for engines, said deviceem- V bodying a ressure chamber having commun1cat1on wah one or more engine cylinders, cut-ofl's lndlvidualto the connections for controlling them, a pressure gage communicating with the chamber, a pair of contacts" permanently spaced to form jump sparks, a

to the spark plug of each of the cylinders, a make and break device in each of the circuits, the other of the spaced contacts being grounded, and a circuit make and breakv device electrically connected with one of the said spaced contacts and adapted to be brought into electrical connection with the 7 other of said contacts for bridging the contacts. v

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 25th da of January, A. D; 1916.

Witnesses: IRMA M. BARING J. H. Joomnn, J r.

WILLIAM E. soMEnvnmn.

circuit leading from one of the saidcontacts 

